在 HTTP 协议中，CONNECT 方法可以开启一个客户端与所请求资源之间的双向沟通的通道。它可以用来创建隧道（tunnel）。
例如，CONNECT 可以用来访问采用了 SSL (HTTPS) 协议的站点。客户端要求代理服务器将 TCP 连接作为通往目的主机隧道。之后该服务器会代替客户端与目的主机建立连接。连接建立好之后，代理服务器会面向客户端发送或接收 TCP 消息流。
CONNECT 是一个应用范围为点到点的方法。
| Request has body | No |
|---|---|
| Successful response has body | Yes |
| Safe | No |
| Idempotent | No |
| Cacheable | No |
| Allowed in HTML forms | No |
语法
CONNECT www.example.com:443 HTTP/1.1
示例
一些代理服务器在创建隧道时会要求进行身份验证。参见 Proxy-Authorization 首部。
CONNECT server.example.com:80 HTTP/1.1 Host: server.example.com:80 Proxy-Authorization: basic aGVsbG86d29ybGQ=
规范
| Specification | Title |
|---|---|
| RFC 7231, section 4.3.6: CONNECT | Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content |
浏览器兼容性
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
CONNECT | Chrome Full support Yes | Edge Full support 12 | Firefox Full support Yes | IE Full support Yes | Opera Full support Yes | Safari Full support Yes | WebView Android Full support Yes | Chrome Android Full support Yes | Firefox Android Full support Yes | Opera Android Full support Yes | Safari iOS Full support Yes | Samsung Internet Android Full support Yes |
Legend
- Full support
- Full support